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69' Eliminator 390 dyno results

11K views 28 replies 16 participants last post by  PetesPonies  
#1 ·
Finally got my 390 back home after being rebuilt and dyno tuned. I will be driving this car on the street so wasn't looking for anything too wild.. But I must say it made less power than what I thought it was going too. Anyways I thought I'd share my build as it is kind of the average mans build. Here is my build list.

-1969 390 block (original to car) bored .030 over
-stock heads, mild porting, 428 valves, hardened seats ect
-speed pro h395p hypereutectic pistons
-edelbrock performer rpm intake manifold
-Holley 750 cfm carb
-jba tri y stainless steel headers
-comp cams hydraulic roller cam 33-432-9
282/288 duration, 230/236 at 50, Cam Style:Hydraulic roller tappet
Basic Operating RPM Range:2,200-5,800
Intake Duration at 050 inch Lift:230
Exhaust Duration at 050 inch Lift:236
Duration at 050 inch Lift:230 int./236 exh.
Advertised Intake Duration:282
Advertised Exhaust Duration:288
Advertised Duration:282 int./288 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:0.521 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:0.532 in.
Valve Lift with Factory Rocker Arm Ratio:0.521 int./0.532 exh.
Lobe Separation (degrees):110
Camshaft Gear Attachment:1-bolt
Computer-Controlled Compatible:No
Grind Number:XR 280HR

Anyways... With that setup it ran with 36 degrees total timing and made 320hp and 380 ft pounds of torque. Peak hp at 5000 rpms. Had a nice torque curve as well. Will be running behind a c6 auto. Anyways please share your thoughts
 
G
#27 ·
It's not a pushrod problem. The pushrods don't get the oil to the top. The FE engines have an oil passageway in the head, that fills one rocker shaft support with oil and it comes out the shaft itself. It's not like a small block where the oil is transferred by the pushrod.
 
G
#29 ·
You are missing the point I think. Whether he used pushrods with holes in them or not has NOTHING to do with the oiling problem. The oil will not go to the pushrods just because they have an oil hole in them. The oil passageway in the head needs to be restricted to have good oil flow through the engine. It has nothing to do with the pushrods, what he used, nothing. It's a separate thing that I'm afraid you don't fully understand and perhaps, even worse, maybe your builder doesn't understand.